https://github.com/createapi/naivedate
Naive date and time
https://github.com/createapi/naivedate
Last synced: about 1 month ago
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Naive date and time
- Host: GitHub
- URL: https://github.com/createapi/naivedate
- Owner: CreateAPI
- License: mit
- Created: 2017-11-29T14:30:17.000Z (about 8 years ago)
- Default Branch: main
- Last Pushed: 2024-09-13T00:13:04.000Z (over 1 year ago)
- Last Synced: 2025-08-10T01:14:50.548Z (6 months ago)
- Language: Swift
- Homepage:
- Size: 70.3 KB
- Stars: 50
- Watchers: 2
- Forks: 7
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
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README
# NaiveDate
)
The standard `Date` type is excellent for working with timestamps and time zones (e.g. `2024-09-29T15:00:00+0300`), but there are scenarios where you don't know or care about the time zone. These types of dates are often referred to as **naive**.
## Usage
The `NaiveDate` library implements three types:
- `NaiveDate` (e.g. `2024-09-29`)
- `NaiveTime` (e.g. `15:30:00`)
- `NaiveDateTime` (e.g. `2024-09-29T15:30:00` - no time zone and no offset).
They all implement `Equatable`, `Comparable`, `LosslessStringConvertible`, and `Codable` protocols. Naive date types can also be converted to `Date`, and `DateComponents`.
### Create
Naive dates and times can be created from a string (using a predefined format – [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6), using `Decodable`, or with a memberwise initializer:
```swift
NaiveDate("2024-10-01")
NaiveDate(year: 2024, month: 10, day: 1)
NaiveTime("15:30:00")
NaiveTime(hour: 15, minute: 30, second: 0)
NaiveDateTime("2024-10-01T15:30")
NaiveDateTime(
date: NaiveDate(year: 2024, month: 10, day: 1),
time: NaiveTime(hour: 15, minute: 30, second: 0)
)
```
### Format
`NaiveDate` supports `Foundation.FormatStyle`:
```swift
let dateTime = NaiveDateTime("2024-11-01T15:30:00")!
dateTime.formatted(date: .numeric, time: .standard)
// prints "11/1/2024, 3:30:00 PM"
```
In addition to the format style, you can use built-in `NaiveDateFormatter` directly.
```swift
let date = NaiveDate("2024-11-01")!
NaiveDateFormatter(dateStyle: .short).string(from: date)
// prints "Nov 1, 2024"
let time = NaiveTime("15:00")!
NaiveDateFormatter(timeStyle: .short).string(from: time)
// prints "3:00 PM"
let dateTime = NaiveDateTime("2024-11-01T15:30:00")!
NaiveDateFormatter(dateStyle: .short, timeStyle: .short).string(from: dateTime)
// prints "Nov 1, 2024 at 3:30 PM"
```
### Convert
When you do need to work with time zones, simply convert `NaiveDate` to `Date`:
```swift
let date = NaiveDate(year: 2024, month: 10, day: 1)
// Creates `Date` in a calendar's time zone
// "2024-10-01T00:00:00+0300" if user is in MSK
Calendar.current.date(from: date)
```
```swift
let dateTime = NaiveDateTime(
date: NaiveDate(year: 2024, month: 10, day: 1),
time: NaiveTime(hour: 15, minute: 30, second: 0)
)
// Creates `Date` in a calendar's time zone
// "2024-10-01T15:30:00+0300" if user is in MSK
Calendar.current.date(from: dateTime)
```
**Important!** The naive types are called this way because they don’t have a time zone associated with them. This means the date may not actually exist in some areas in the world, even though they are “valid”. For example, when daylight saving changes are applied the clock typically moves forward or backward by one hour. This means certain dates never occur or may occur more than once. If you need to do any precise manipulations with time, always use native `Date` and `Calendar`.
## Minimum Requirements
| NaiveDate | Swift | Platforms |
|----------------------|------------------|--------------------------------------------|
| NaiveDate 1.1 | Swift 5.9 | iOS 13, tvOS 13, watchOS 6, macOS 10.15 |
| NaiveDate 1.0 | Swift 5.3 | iOS 11, tvOS 11, watchOS 4, macOS 10.13, |
## License
NaiveDate is available under the MIT license. See the LICENSE file for more info.